Where does extra outside scholarship money go that isn't used in cost of attendance?

For privacy reasons I’m not going to say the school, but my daughter is in a unicorn situation in which she has received scholarships that result in the bursar transferring the overage into her personal account. She gets a flat amount for books each semester, a flat amount for travel expenses, and a flat amount for personal expenses. She is not required to provide any type of receipt for those and she’s used the overage for sorority expenses/dues. An additional outside scholarship is being paid directly to her and the school is allowing her to hold that for summer and not taking it away from her regular amount.

It’s a unicorn situation like I said. And a tax nightmare.